x - y = 4 হলে, নিচের কোন উক্তিটি সঠিক ?
Solution
Correct Answer: Option D
দেওয়াআছে, x - y = 4
=> (x - y)3 = 43
=> x3 - 3x2 y + 3xy2 - y3 = 64
=> x3 - y3 - 3xy (x - y) = 64
=> x - y - 3xy \( \times \) 4 = 64
=> x3 - y3 - 12xy = 64
x3 - y3 - 12xy = 64
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